[Feature Request] Repeat X time

[Sandlayth]

Add an optionnal option to repeat in order to repeat X time a song.
Example : I want to repeat 3 times the first video, twice the second, and 5 the 20th one.
I just type:
repeat 1[3] 2[2] 20[5]
instead of
repeat 1 1 1 2 2 20 20 20 20 20

[ids1024]

This has been implemented in #490.